<?hh // strict
/**
 * Copyright (c) 2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the "hack" directory of this source tree.
 *
 *
 */

function foo(Map<string, Map<string, int>> $map): void {
  foreach ($map as $m) {
    $m = $m[''];

  }
}
